JPS6224077Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotating device for a wind direction changing grill provided in an electric fan, and aims to provide an electric fan that reduces vibration when the wind direction changing grill is rotated.

Conventionally, this type of device has been disclosed in Japanese Utility Model Application Publication No. 56-145697, as shown in FIGS. 1 and 2. In the figure, 1 is a casing consisting of a front casing 2 and a rear casing 3, with a ventilation passage 4 formed in the center.A ventilation motor 5 is installed in the center of the ventilation passage, and a blade 6 is attached to the shaft of the casing with a blade tightening knob. It is attached by 17. On the opposite side of the blower motor, there is a convex bearing boss 14 on the front casing 2, and a wind direction changing grill 7 with a metal 15 formed in the center is rotatably attached to the front casing bearing boss 14 by a grill knob 16. ing. 9 is a rear grill for blade protection. On the upper surface of the casing 1, there is a switch panel 11 on which a push button switch 10 and a time switch 12 for controlling the rotation of the ventilation motor 5 are attached, and on the lower side, there is a switch panel 11 on which a push button switch 10 and a time switch 12 are attached.
One stand 13 is attached to each of the left and right sides to stabilize the.

The roller 18 that rotates the wind direction changing grille 7 is connected to a grille rotation motor 21 as shown in FIG.
The roller 18 is attached to a shaft 23 and is composed of a rubber pulley 19 and a rim 20, as shown in FIG. The grill rotation motor 21 is attached to a mounting plate 22 at two locations with mounting screws 24, and is sandwiched onto a boss 28 provided in the front casing 2 using a seat 25 and a flat washer 26, and is secured to a fulcrum using a tightening screw 27. A is rotatably tightened with a slight gap, and the movable part B on the opposite side is mounted on a similar boss 28 provided on the front casing 2 with a seat 25 and a flat washer 26 to make the mounting plate 22 a sandwich bench. It is slidably attached to the mounting plate 22 with a tightening screw 27 through an elongated hole 30. Also roller 1
8 is pulled by a spring 29 so as to be able to press against the circumferential side 8 of the wind direction changing grille 7 with a constant load.

Next, the operation will be explained. (The blower motor is omitted) and the grill of the push button switch 10.
When you press the ON button, the grill rotation motor 21
rotates, and at the same time, the rotational speed reduced by a speed reduction mechanism (not shown) built into this motor is transmitted to the grill rotation motor shaft 23, and the rubber pulley 1 on the outer periphery of the roller 18 attached to this shaft is transmitted to the grill rotation motor shaft 23.
The part 9 slides on the circumferential side 8 of the wind direction changing grille 7 to rotate the wind direction changing grille, thereby diffusing the wind sent out by the blades to the surrounding area. At this time, the wind direction change grill 7
Even if the peripheral side 8 is not necessarily concentric and is slightly deformed, the pulley is connected to the grill rotation motor 21.
Since the mounting plate 22 is pulled by a spring 29 and pressed against the wind direction changing grille circumferential side 8 with a constant force, it can rotate using the bearing boss part 14 of the front casing 2 as a bearing without slipping. Furthermore, since the mounting plate 22 has an elongated hole 30 so that the mounting plate 22 on the movable side B can freely slide around the fulcrum part A, the roller 18 may move slightly back and forth if the wind direction changing grille is deformed. It is now able to fully follow changes even if the robot moves rapidly. In this case, both the fulcrum part A and the movable part B are fastened to the boss 28 with a slight gap so that they can rotate freely.

In the conventional wind direction changing grill rotating motor 21, a mounting plate 22 is directly screwed, and this mounting plate 22 is made into a sandwich arch by a seat 25 and a flat washer 26, and is screwed to a boss 28 integrally formed in the casing 1. Therefore, the vibration of the wind direction change grill rotating motor 21 is directly transmitted to the casing 1, and since the mounting plate 22 is screwed to the casing 1 via the seat 25, the slight gap here vibrates, producing noise. There were defects that degraded the quality of the product.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above.The motor for rotating the wind direction changing grille is attached to the casing via a mounting plate, and the fulcrum part and the movable part are integrated on the mounting plate. The purpose is to provide an electric fan that generates less noise.

An embodiment of this invention will be described below with reference to FIGS. 4 to 9. In the figure, a roller 18 for rotating the wind direction changing grille 7 is composed of a rubber pulley 19 and a rim 20, as shown in FIG. The wind direction changing grill rotation motor 21 is attached to the first attachment plate at two locations with attachment screws 24 with a rubber cushion 33 in between. This mounting plate 34
There are holes 38 for inserting the rubber seats 32 at three locations on the outer periphery, and a slit 40 facing outward. This is to make it easier to attach the rubber seat 32. Also, the mounting plate 35 is connected to the hole 3 of the mounting plate 34.
A hole 39 larger than 8 is drilled at a position opposite the hole 38. In order to make it easier to push in the mounting plates 34 and 35 with the tip of a screwdriver, etc., a hollow recess 32a is formed in the center of the upper end, and the tip is tapered to make it easier to insert into the mounting plate 35. , are integrated with a rubber seat 32 having grooves 32b and 32c having substantially the same diameter as the hole 39 of the mounting plate 35. Support points A at both ends of the mounting plate 35
Bushes 36 and 37 are simultaneously formed in the movable part B by integrally molding a self-lubricating resin (polyacetal, polyamide, etc.) in order to reduce the sliding resistance here. The fulcrum part A is rotatably fastened to the boss 28 of the front casing 2 by a tightening screw 27 via a flat washer 26, and the movable part B is rotatably fastened to the boss 28 of the front casing 2 by a bushing as shown in FIG. 36 is pressed by a coil spring 31 so as to be able to slide between a flat washer 37 and a boss 28, and is attached with a tightening screw 27. Also, wind direction change grill 7
The mounting plate 35 is pulled by a spring 29 so that the circumferential side 8 of the wind direction changing grille can always be pressed against the circumferential side 8 of the wind direction changing grille with a constant force even if the concentric circles of the grille are not aligned.

Next, the operation will be explained. First, when the grill ON button of the pushbutton switch 10 is pressed, the grill rotation motor 21 rotates, and at the same time, the rotation is decelerated by a speed reduction mechanism (not shown) built into this motor and is applied to the grill rotation motor shaft 23. As a result, the roller 18 attached to this shaft rotates, and the rubber pulley 19 on the outer periphery of the roller rotates the circumferential side 8 of the wind direction changing grille 7.
As a result, the wind sent out from the blades 6 is diffused to the surrounding area. Grill drive motor 23 generated at this time
The magnetic vibrations are transmitted from the output shaft 23 of the grill drive motor 21 to the rubber pulley 19, but since the outer periphery of the roller 18 is made of rubber, the vibrations transmitted to the wind direction changing grille 7 are absorbed here. Also, since the cushion 33 is sandwiched and screwed between the grill drive motor 21 and the mounting plate 34, most of the motor magnetic vibration is absorbed here. continues at the rubber seat 32, so even if the mounting plate 34 vibrates, the vibration will not be transmitted to the next mounting plate 35, and vibration noise generated from a slight gap between the fulcrum part A and the movable part B. Mobutsuyu 3
6 and 37 are integrally molded with the mounting plate 35, and the movable part B is connected to the boss 2 by the coil spring 31.
8, the grill drive motor 2
1 vibration noise can also be prevented. In addition, even if the circumferential side 8 of the wind direction changing grille 7 is not concentric or slightly deformed, the grille drive part is always pressed with a constant force by the spring 29, so it will not slip and can be moved to the bearing boss 14 of the front casing 2. can rotate as a bearing. Rubber pulley 1 of the roller 18
9. The rubber seat 32 and cushion 33 are made of the same material,
Manufacturing them with the same hardness is still advantageous in preventing sweeping vibrations.

In the above embodiment, the contact portion between the wind direction changing grille and the rubber roller is provided above the horizontal line passing through the center of rotation of the wind direction changing grille, but the contact portion is not limited to this, and may be provided below the horizontal line. I don't mind.

As described above, according to this invention, there is a rubber pulley provided on the outer periphery of the roller rim and in direct contact with the wind direction changing grille, and a first rubber pulley attached to the output shaft side of the grill rotation motor with a cushion in between. a second mounting plate, one end of which is rotatably supported by a boss of the casing, and the other end of which is pivotally supported by another boss of the casing such that it can slide within a predetermined range; A plurality of vibration isolators made of a cushion material are provided between the first mounting plate and the second mounting plate so that they face each other at a predetermined interval, and are located outside the outer shape of the grill rotation motor. A bushing integrally insert-molded of synthetic resin was provided at the fulcrum part at one end of the second mounting plate and the movable part at the other end, and the bushings on the movable part were slidably pressed together with a spring. The transmission of noise and vibration from a motor for rotating a wind direction changing grill to a casing can be suppressed as much as possible by a rubber pulley, cushion, anti-vibration seat, and bushing, and a fan that generates little noise and vibration can be provided.

[Brief explanation of the drawing]

Fig. 1 is an overall view of a conventional electric fan, Fig. 2 is a view of the rotating part of the conventional wind direction changing grille seen from the back side, Fig. 3 is a sectional view taken along line A--A in Fig. 2, and Fig. 4 shows the roller, FIG. 4a is a half-sectional view, and FIG. 4b is a half-sectional view.
5 is a front view, FIG. 5 is a rear view showing the rotating part of the wind direction changing grill of the present invention, FIG. 6 is a cross-sectional view taken along line E--I of FIG. The figure is a plan view of the mounting plate 35. In the figure, A is the fulcrum, B is the movable part, 1 is the casing, 2 is the front casing, 3 is the rear casing, 7 is the wind direction changing grill, 18 is the roller, 32 is the rubber seat, 33 is the cushion, 34 and 35 are the installation Board, 3
6 and 37 are buttons. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A casing 1 provided with a ventilation passage penetrating from the front to the back, a blower motor 5 provided in the casing, a blade 6 rotated by the blower motor, and a wind blower blown by the blade. In an electric fan comprising a wind direction changing grille 7 rotatably provided across the ventilation path so as to change the direction, and a grill rotation motor 21 having a roller 18 in contact with the circumferential side of the wind direction changing grille. , a rubber pulley 19 provided on the outer periphery of the rim of the roller 18 and in direct contact with the airflow direction changing grille 7, and a rubber pulley 19 attached to the output shaft side of the grille rotation motor 21 with a cushion 33 interposed therebetween.
One end is rotatably supported by the mounting plate 34 and the boss 28 of the casing 1, and the other end is pivotally supported by the other boss 28 of the casing 1 so as to be slidable within a predetermined range. the second mounting plate 35 and the first mounting plate 35;
A plurality of cushions made of cushion material are provided between the mounting plate 34 and the second mounting plate 35 so that they face each other at a predetermined interval, and are located outside the outer shape of the grill rotation motor 21. a vibration isolating seat 32, and a bushing 36 integrally insert-molded with synthetic resin at the fulcrum part A at one end of the second mounting plate 35 and the movable side B at the other end, respectively;
37, and a bush 37 of the movable part B is slidably pressed against a spring 31.